//=========================================================================================
bool Matrix::AssignCofactorTo( int row, int col, Scalar& cofactor ) const
{
Matrix subMatrix;
if( !subMatrix.AssignSubMatrix( row, col, *this ) )
return false;
if( !subMatrix.AssignDeterminantTo( cofactor ) )
return false;
if( ( row + col ) % 2 == 1 )
cofactor = cofactor * -1.0;
return true;
}
//=========================================================================================
bool Matrix::AssignInverse( const Matrix& matrix, InverseType inverseType, InverseResult& inverseResult )
{
// TODO: Calculate left and right inverse matrices for non-square matrices.
inverseResult = NONSINGULAR_MATRIX;
Scalar scalar;
if( !matrix.AssignDeterminantTo( scalar ) )
return false;
if( scalar == 0.0 )
{
inverseResult = SINGULAR_MATRIX;
return true;
}
if( !scalar.Invert() )
return false;
if( matrix.rows == 1 && matrix.cols == 1 )
{
if( !AssignDimensions( 1, 1 ) )
return false;
if( !AssignScalarFrom( 0, 0, scalar ) )
return false;
}
else if( matrix.rows == matrix.cols )
{
if( !AssignAdjugate( matrix ) )
return false;
if( !Scale( scalar ) )
return false;
}
else if( matrix.rows > matrix.cols )
return false; // TODO: Deal with this case.
else if( matrix.rows < matrix.cols )
return false; // TODO: Deal with this case.
return true;
}